Heat oven to 350 degrees. Wash berries, quarter strawberries.
In a mixing bowl, combine pudding and water with a fork to get all lumps out.
Add in berries and cinnamon, mixing well.
Pour into greased pie dish.
In a separate bowl, mix together oats, sugar, and yogurt. Add a little more yogurt if it's too thick.
Spread oats over berries, leaving an empty edge.
Bake at 350* for 40-ish minutes or until top is golden brown.